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WASHINGTON, DC - APRIL 25: People protest in front of the U.S. Supreme Court, on April 25, 2012 in Washington, DC. Later this morning the high court will hear arguments on Arizona v. United States and will be tasked with deciding the conflicting roles of national and state governments in controlling the lives of noncitizens living illegally in the U.S. while deciding the constitutionality of Arizona's immigration law SB 1070. (Photo by Mark Wilson/Getty Images)